MAX3490ESA+ - 3.3V 10Mbps RS-485/RS-422 Transceiver
部品番号: MAX3490ESA+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.35 | $3.35 |
| 10 | $3.35 | $33.50 |
| 100 | $3.35 | $335.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $3.35 | $3,350.00 |
MAX3490ESA+ 概要
An RS-485/RS-422 transceiver is an interface IC that converts logic-level digital signals into differential signals for reliable communication over wired networks. In this product category, the transmitter drives a differential bus, while the receiver converts the differential bus voltage back into a logic-level signal. RS-422 commonly supports point-to-point communication, while RS-485 supports multipoint bus arrangements. The MAX3490ESA+ combines these functions in one package, reducing the number of external interface components.
The verified listing identifies the MAX3490 family as 3.3V, low-power transceivers for RS-485 and RS-422 communication. The MAX3490 device is listed by Analog Devices as a 3.3V-powered, 10Mbps, slew-rate-limited, true RS-485/RS-422 transceiver. The + suffix denotes the lead-free ordering configuration commonly shown by distributors, while the exact package and suffix conventions should be confirmed against the manufacturer ordering guide before production release.
Slew-rate limiting helps control the transition speed of the driver, reducing electromagnetic interference and cable reflections associated with faster edges. This is particularly useful when the transceiver drives longer cables or imperfectly terminated buses. The 10Mbps capability supports high-speed point-to-point links, but cable length, topology, termination, grounding, and signal integrity must be evaluated as a complete system rather than treated as an isolated IC specification.
Typical applications include industrial RS-485 links, building and factory automation, data acquisition equipment, motor-control systems, security equipment, and embedded communications modules. The 3.3V supply is convenient for systems using 3.3V microcontrollers, DSPs, FPGAs, or other digital controllers. Designers should verify voltage levels, driver and receiver enable timing, bus termination, protection requirements, and operating-temperature limits against the manufacturer datasheet before release.
The primary design consideration is ensuring the transceiver operates within the electrical limits of the intended bus. Differential routing should use controlled impedance where practical, the ground reference should be maintained, and unused inputs should not be left floating. This page combines the verified manufacturer and distributor information with practical application guidance, packaging information, and engineering selection criteria for evaluating the MAX3490ESA+.
ドロップイン代替品: MAX3490ESA+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MAX3490EESA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3490ESA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3490ESA/GG8
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3490ESA+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3490EESA+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX3490ESA+ 仕様
| Product Type | RS-485/RS-422 transceiver |
| 電源電圧 | 3.3V |
| データレート | Up to 10Mbps |
| Driver and Receiver Count | 1 driver and 1 receiver |
| Supported Standards | RS-485 and RS-422 |
| Driver Type | Slew-rate limited |
| Interface Classification | Line transceiver |
| パッケージ | 8-SOIC |
| 実装タイプ | Surface mount |
| Logic Technology | CMOS |
| Manufacturer | Maxim Integrated |
| Analog Devices Product Status | PRODUCTION |
| Operating Voltage | 3.3V powered |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| Automotive Qualification | unknown |
MAX3490ESA+ 8-soic ピン配置ガイド
MAX3490ESA+ (8-soic パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MAX3490ESA+.
詳細は データシート をご参照ください。
主な用途
MAX3490ESA+ の用途: 6 件s: Industrial RS-485 Automation Bus, Building Automation Controller, Data Acquisition Equipment, Motor Control and Condition Monitoring, Security and Access-Control Equipment, Embedded Communication Module.
Industrial RS-485 Automation Bus
The MAX3490ESA+ fits industrial automation links that require a 3.3V differential transceiver with operation up to 10Mbps. Place it between a 3.3V controller and a field bus, then route the differential pair away from switching nodes and maintain a nearby ground reference. The slew-rate-limited driver can reduce EMI and reflections, but the final cable length, topology, and termination must be validated in the deployed environment.
おすすめ
Building Automation Controller
Use the MAX3490ESA+ in a building-control node that communicates with sensors, actuators, or remote I/O over a wired differential bus. Its 3.3V supply is compatible with many embedded controllers, while the 8-SOIC package supports compact surface-mount layouts. Keep the transceiver close to the connector, use a controlled ground path, and confirm that the intended RS-485 topology and cable loading are supported.
おすすめ
Data Acquisition Equipment
The MAX3490ESA+ is suitable for connecting a measurement instrument to an external controller over a robust differential interface. Its 3.3V operation can simplify power design around low-voltage controllers, while the driver and receiver are integrated in one package. For accurate measurement systems, separate sensitive analog routing from the bus, use controlled-impedance traces, and verify common-mode and grounding requirements against the complete system specification.
おすすめ
Motor Control and Condition Monitoring
The MAX3490ESA+ can provide a wired diagnostic link between a motor controller and a monitoring unit. A differential bus is useful where ground offsets or noise make single-ended communication less reliable. Keep the transceiver and protection network close to the cable entry, maintain a controlled return path, and use the 10Mbps rating as a maximum device capability rather than assuming it is valid for every motor cable or environmental condition.
おすすめ
Security and Access-Control Equipment
The MAX3490ESA+ can support a low-voltage wired communication path in access-control panels, card readers, or alarm equipment. Integrate the transceiver near the external connector and provide ESD or surge protection appropriate to the installation environment. The 3.3V supply helps reduce system-level power complexity, while the differential interface can improve noise immunity. Confirm enclosure grounding, cable routing, and field-bus loading before production deployment.
おすすめ
Embedded Communication Module
The MAX3490ESA+ is appropriate for an embedded module that bridges a low-voltage digital controller to an RS-485 or RS-422 physical layer. Its integrated driver and receiver reduce the number of discrete interface functions required around the controller. Use short, symmetric differential traces, provide the required bypass and protection components, and verify that the module's bus configuration supports the intended number of nodes and cable length.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX3490ESA+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX3490EESA | MAX3490ESA | MAX3490ESA/GG8 | MAX3490ESA+T | MAX3490EESA+T |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
主な差別化要因
- 3.3V operation supports low-voltage embedded interfaces （vs MAX3490EESA)
- Integrated one-driver, one-receiver interface （vs MAX3490ESA)
- Slew-rate-limited operation for wired communication （vs MAX3490ESA+T)
設計ノート
Route the RS-485 or RS-422 driver and receiver as a close, symmetric differential pair with a continuous ground reference. Place the transceiver near the connector and provide local bypass capacitance according to the manufacturer guidance. Keep switching regulators, high-current return paths, and clocks away from the communication pair because their edge energy can appear as common-mode noise even when the differential receiver is correctly terminated.
The MAX3490 is identified as slew-rate limited, which helps reduce electromagnetic interference and reflections from faster cable edges. That benefit does not eliminate the need to validate cable length, topology, termination, and receiver loading. For a production design, test the intended cable and connector configuration, observe differential and common-mode waveforms, and confirm that the selected baud rate remains reliable under worst-case noise and bus loading.
Do not assume that a 10Mbps device rating guarantees a 10Mbps link over every cable. Long cables, star topologies, missing termination, incorrect grounding, excessive node count, and unprotected connectors can reduce reliability. Confirm the exact MAX3490ESA+ pinout and ordering suffix from the manufacturer datasheet, and validate enable sequencing so the receiver or driver is not driven during an unintended bus state.
コンプライアンス情報
The supplied verified data does not explicitly state compliance status for MAX3490ESA+. Do not infer RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance from the ordering suffix or distributor listing alone.
